“…In particular, OT has been described as being involved in positive social intra-species interactions [ 32 , 33 , 34 , 35 ] and inter-species interactions, such as human-animal interactions [ 36 , 37 , 38 , 39 , 40 ]. In dog applied ethology, OT is often related to research on how a social interspecific interaction with humans [ 41 , 42 ] or social stress [ 43 ] will modify OT levels, or on the effect of OT external administration on dogs’ cognition and communication and other behaviors or aptitudes [ 21 , 44 , 45 , 46 , 47 , 48 ]. For instance, intranasally applied oxytocin has been shown to increase positive expectations [ 44 ], increase the use of human social cues such as pointing [ 48 ], modulate the dogs’ aggressive response to the threatening cues of a human [ 49 ], increase affiliation toward owners and conspecifics [ 38 ], increase intraspecific play behaviors [ 34 ], and influence the visual contact with the owners [ 45 , 46 ].…”